Trykkluft

Trykkluft, or compressed air, is air stored at pressures higher than the surrounding atmosphere. It is widely used as an energy carrier in industry and for operating pneumatic tools, processes, and cleaning. Compressed air is produced by a compressor that draws in ambient air, compresses it, and stores it in a receiver. Common compressor types include reciprocating piston, screw, and centrifugal machines. Working pressures for general use typically range from about 4 to 10 bar gauge (roughly 0.4 to 1 MPa), though some tools and processes require higher or lower pressures. Both oil-free and oil-lubricated variants are available.

Quality and treatment are important because moisture, particulates, and oil can affect performance and processes. Condensation is common and must be managed with air dryers (refrigerated or desiccant) and filtration, as well as condensate drains. In oil-free systems, oil carryover is minimized, while lubricated systems use controlled lubrication. The quality of compressed air is described by standards such as ISO 8573-1, which specify limits for solids, water, and oil.

A typical system layout includes a compressor, aftercooler, receiver, air dryer, filtration and coalescing filters, regulators and lubricators, and a network of piping and outlets. Regular maintenance, leak detection, and proper drainage are essential for efficiency, safety, and reliability. Hazards include the energy stored in tanks and piping and the potential for air contamination affecting sensitive applications.

Common applications encompass powering pneumatic tools, operating automation actuators, spray painting, cleaning, and medical or dental devices that require clean, dry air.